The government is doing mass license plate scanning, as are private companies like McDonalds. Just because something is possible doesn't mean it's a good idea...

The good part is that people will eventually rebel against this stuff-- hopefully in a peaceful way. Those will be suppressed for awhile, like this Democrat saying that people who "make fun of politicians" should be thrown in jail.

But in the medium-term, rebellions often work because the State enforcers can't keep their morale up.